Lifting oil cylinder buffer device for fork lift

Abstract

The invention discloses a lifting oil cylinder buffer device for a fork lift. The lifting oil cylinder buffer device comprises a one-way valve, a piston, a gasket, a buffer shaft sleeve, a buffer plunger, a cylinder base, an oil inlet hole, a first oil cavity, a second oil cavity, an oil outlet and a cylinder barrel. The first oil cavity is horizontally formed in the cylinder base, and the oil inlet hole is formed in one side of the cylinder base. The original buffer shaft sleeve with a straight hole inside is changed into the horn hole and straight hole integrated buffer shaft sleeve so thatafter the buffer plunger enters the buffer shaft sleeve, oil throttling is changed into progressive throttling, the throttling effect is improved in an ascending way slowly and stably, the buffer gapis adjusted to be 16 mm of the optimal size obtained after the test, and thus the buffering effect is guaranteed and the asynchronous phenomenon caused by accumulation of machining errors is eliminated, the noise generated by instantaneous throttling when the oil cylinder of the electric fork lift and the fork lift with special working condition requirements on noise moves to the buffering part iseliminated, and an ideal buffering effect is achieved by adjusting the optimal buffering gap through a large number of on-site tests.

Description

technical field

[0001] The invention relates to the field of forklift equipment, in particular to a lifting cylinder buffer device for a forklift. Background technique

[0002] At present, two-stage mast forklifts, two-stage full-free mast forklifts, and three-stage full-free mast forklifts are common in the forklift market. The oil return circuit of the hydraulic oil is sealed, and when the load of the cylinder decreases, the load forces the hydraulic oil below the piston to pass through the gap between the buffer plunger and the buffer bushing to play a buffering role.

[0003] In the industry, the buffer structure between the buffer plunger and the buffer bushing is usually to adjust the horizontal gap between the two to achieve buffer performance. Therefore, when the cylinder piston descends to the buffer stage, the throttle is instantaneous, the hydraulic oil pressure changes instantaneously, and the pressure pulse is large. However, when there is noise, ordinary inter...

Examples

Embodiment Construction

[0020] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0021] see Figure 1-2 As shown, a lifting cylinder buffer device for forklifts includes a check valve 1, a piston 2, a gasket 3, a buffer bushing 4, a buffer plunger 5, a cylinder seat 7, an oil inlet 8, a first oil Cavity 9, second oil chamber 10, oil outlet 11 and cylinder barrel 14, a first oil chamber 9 is horizontally opened inside the cylinder base 7, and an oil inlet hole 8 is opened on one side of the cylinder base 7, and the oil inlet hole 8 is connected with the first The oil chamber 9 is conductively connected,...

technical field

[0001] The invention relates to the field of forklift equipment, in particular to a lifting cylinder buffer device for a forklift. Background technique

[0002] At present, two-stage mast forklifts, two-stage full-free mast forklifts, and three-stage full-free mast forklifts are common in the forklift market. The oil return circuit of the hydraulic oil is sealed, and when the load of the cylinder decreases, the load forces the hydraulic oil below the piston to pass through the gap between the buffer plunger and the buffer bushing to play a buffering role.

[0003] In the industry, the buffer structure between the buffer plunger and the buffer bushing is usually to adjust the horizontal gap between the two to achieve buffer performance. Therefore, when the cylinder piston descends to the buffer stage, the throttle is instantaneous, the hydraulic oil pressure changes instantaneously, and the pressure pulse is large. However, when there is noise, ordinary inter...

Examples

Embodiment Construction

[0020] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0021] see Figure 1-2 As shown, a lifting cylinder buffer device for forklifts includes a check valve 1, a piston 2, a gasket 3, a buffer bushing 4, a buffer plunger 5, a cylinder seat 7, an oil inlet 8, a first oil Cavity 9, second oil chamber 10, oil outlet 11 and cylinder barrel 14, a first oil chamber 9 is horizontally opened inside the cylinder base 7, and an oil inlet hole 8 is opened on one side of the cylinder base 7, and the oil inlet hole 8 is connected with the first The oil chamber 9 is conductively connected,...

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